﻿using System;
using System.IO;
using System.Diagnostics;
using Microsoft.Win32;

using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip;

public class SharpZip
{
    public SharpZip()
    { }

    /// <summary>
    /// 压缩
    /// </summary> 
    /// <param name="filename"> 压缩后的文件名(包含物理路径)</param>
    /// <param name="directory">待压缩的文件夹(包含物理路径)</param>
    public static void PackFiles(string filename, string directory)
    {
        try
        {
            FastZip fz = new FastZip();
            fz.CreateEmptyDirectories = true;
            fz.CreateZip(filename,directory,true,"");
            fz = null;
        }
        catch (Exception)
        {
            throw;
        }
    }

    /// <summary>
    /// 解压缩
    /// </summary>
    /// <param name="file">待解压文件名(包含物理路径)</param>
    /// <param name="dir"> 解压到哪个目录中(包含物理路径)</param>
    public static bool UnpackFiles(string file, string dir)
    {
        try
        {
            if (!Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            ZipInputStream s = new ZipInputStream(File.OpenRead(file));
            ZipEntry theEntry;
            while ((theEntry = s.GetNextEntry()) != null)
            {
                string directoryName = Path.GetDirectoryName(theEntry.Name);
                string fileName = Path.GetFileName(theEntry.Name);
                if (directoryName != String.Empty)
                {
                    Directory.CreateDirectory(dir + directoryName);
                }
                if (fileName != String.Empty)
                {
                    FileStream streamWriter = File.Create(dir + theEntry.Name);
                    int size = 2048;
                    byte[] data = new byte[2048];
                    while (true)
                    {
                        size = s.Read(data, 0, data.Length);
                        if (size > 0)
                        {
                            streamWriter.Write(data, 0, size);
                        }
                        else
                        {
                            break;
                        }
                    }
                    streamWriter.Close();
                }
            }
            s.Close();
            return true;
        }
        catch (Exception)
        {
            throw;
        }
    }
}

public class ClassZip
{
    #region 私有方法
    /// <summary>
    /// 递归压缩文件夹方法
    /// </summary>
    private static bool ZipFileDictory(string FolderToZip, ZipOutputStream s, string ParentFolderName)
    {
        bool res = true;
        string[] folders, filenames;
        ZipEntry entry = null;
        FileStream fs = null;
        Crc32 crc = new Crc32();
        try
        {
            entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/"));
            s.PutNextEntry(entry);
            s.Flush();
            filenames = Directory.GetFiles(FolderToZip);
            foreach (string file in filenames)
            {
                fs = File.OpenRead(file);
                byte[] buffer = new byte[fs.Length];
                fs.Read(buffer, 0, buffer.Length);
                entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/" + Path.GetFileName(file)));
                entry.DateTime = DateTime.Now;
                entry.Size = fs.Length;
                fs.Close();
                crc.Reset();
                crc.Update(buffer);
                entry.Crc = crc.Value;
                s.PutNextEntry(entry);
                s.Write(buffer, 0, buffer.Length);
            }
        }
        catch
        {
            res = false;
        }
        finally
        {
            if (fs != null)
            {
                fs.Close();
                fs = null;
            }
            if (entry != null)
            {
                entry = null;
            }
            GC.Collect();
            GC.Collect(1);
        }
        folders = Directory.GetDirectories(FolderToZip);
        foreach (string folder in folders)
        {
            if (!ZipFileDictory(folder, s, Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip))))
            {
                return false;
            }
        }
        return res;
    }

    /// <summary>
    /// 压缩目录
    /// </summary>
    /// <param name="FolderToZip">待压缩的文件夹，全路径格式</param>
    /// <param name="ZipedFile">压缩后的文件名，全路径格式</param>
    private static bool ZipFileDictory(string FolderToZip, string ZipedFile, int level)
    {
        bool res;
        if (!Directory.Exists(FolderToZip))
        {
            return false;
        }
        ZipOutputStream s = new ZipOutputStream(File.Create(ZipedFile));
        s.SetLevel(level);
        res = ZipFileDictory(FolderToZip, s, "");
        s.Finish();
        s.Close();
        return res;
    }

    /// <summary>
    /// 压缩文件
    /// </summary>
    /// <param name="FileToZip">要进行压缩的文件名</param>
    /// <param name="ZipedFile">压缩后生成的压缩文件名</param>
    private static bool ZipFile(string FileToZip, string ZipedFile, int level)
    {
        if (!File.Exists(FileToZip))
        {
            throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!");
        }
        FileStream ZipFile = null;
        ZipOutputStream ZipStream = null;
        ZipEntry ZipEntry = null;
        bool res = true;
        try
        {
            ZipFile = File.OpenRead(FileToZip);
            byte[] buffer = new byte[ZipFile.Length];
            ZipFile.Read(buffer, 0, buffer.Length);
            ZipFile.Close();

            ZipFile = File.Create(ZipedFile);
            ZipStream = new ZipOutputStream(ZipFile);
            ZipEntry = new ZipEntry(Path.GetFileName(FileToZip));
            ZipStream.PutNextEntry(ZipEntry);
            ZipStream.SetLevel(level);

            ZipStream.Write(buffer, 0, buffer.Length);
        }
        catch
        {
            res = false;
        }
        finally
        {
            if (ZipEntry != null)
            {
                ZipEntry = null;
            }
            if (ZipStream != null)
            {
                ZipStream.Finish();
                ZipStream.Close();
            }
            if (ZipFile != null)
            {
                ZipFile.Close();
                ZipFile = null;
            }
            GC.Collect();
            GC.Collect(1);
        }
        return res;
    }
    #endregion

    /// <summary>
    /// 压缩
    /// </summary>
    /// <param name="FileToZip">待压缩的文件目录</param>
    /// <param name="ZipedFile">生成的目标文件</param>
    /// <param name="level">6</param>
    public static bool Zip(String FileToZip, String ZipedFile, int level)
    {
        if (Directory.Exists(FileToZip))
        {
            return ZipFileDictory(FileToZip, ZipedFile, level);
        }
        else if (File.Exists(FileToZip))
        {
            return ZipFile(FileToZip, ZipedFile, level);
        }
        else
        {
            return false;
        }
    }

    /// <summary>
    /// 解压
    /// </summary>
    /// <param name="FileToUpZip">待解压的文件</param>
    /// <param name="ZipedFolder">解压目标存放目录</param>
    public static void UnZip(string FileToUpZip, string ZipedFolder)
    {
        if (!File.Exists(FileToUpZip))
        {
            return;
        }
        if (!Directory.Exists(ZipedFolder))
        {
            Directory.CreateDirectory(ZipedFolder);
        }
        ZipInputStream s = null;
        ZipEntry theEntry = null;
        string fileName;
        FileStream streamWriter = null;
        try
        {
            s = new ZipInputStream(File.OpenRead(FileToUpZip));
            while ((theEntry = s.GetNextEntry()) != null)
            {
                if (theEntry.Name != String.Empty)
                {
                    fileName = Path.Combine(ZipedFolder, theEntry.Name);
                    if (fileName.EndsWith("/") || fileName.EndsWith("\\"))
                    {
                        Directory.CreateDirectory(fileName);
                        continue;
                    }
                    streamWriter = File.Create(fileName);
                    int size = 2048;
                    byte[] data = new byte[2048];
                    while (true)
                    {
                        size = s.Read(data, 0, data.Length);
                        if (size > 0)
                        {
                            streamWriter.Write(data, 0, size);
                        }
                        else
                        {
                            break;
                        }
                    }
                }
            }
        }
        finally
        {
            if (streamWriter != null)
            {
                streamWriter.Close();
                streamWriter = null;
            }
            if (theEntry != null)
            {
                theEntry = null;
            }
            if (s != null)
            {
                s.Close();
                s = null;
            }
            GC.Collect();
            GC.Collect(1);
        }
    }
}

public class ZipHelper
{
    #region 私有变量
    String the_rar;
    RegistryKey the_Reg;
    Object the_Obj;
    String the_Info;
    ProcessStartInfo the_StartInfo;
    Process the_Process;
    #endregion

    /// <summary>
    /// 压缩
    /// </summary>
    /// <param name="zipname">要解压的文件名</param>
    /// <param name="zippath">要压缩的文件目录</param>
    /// <param name="dirpath">初始目录</param>
    public void EnZip(string zipname, string zippath, string dirpath)
    {
        try
        {
            the_Reg = Registry.ClassesRoot.OpenSubKey(@"Applications\WinRAR.exe\Shell\Open\Command");
            the_Obj = the_Reg.GetValue("");
            the_rar = the_Obj.ToString();
            the_Reg.Close();
            the_rar = the_rar.Substring(1, the_rar.Length - 7);
            the_Info = " a    " + zipname + "  " + zippath;
            the_StartInfo = new ProcessStartInfo();
            the_StartInfo.FileName = the_rar;
            the_StartInfo.Arguments = the_Info;
            the_StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
            the_StartInfo.WorkingDirectory = dirpath;
            the_Process = new Process();
            the_Process.StartInfo = the_StartInfo;
            the_Process.Start();
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
        }
    }

    /// <summary>
    /// 解压缩
    /// </summary>
    /// <param name="zipname">要解压的文件名</param>
    /// <param name="zippath">要解压的文件路径</param>
    public void DeZip(string zipname, string zippath)
    {
        try
        {
            the_Reg = Registry.ClassesRoot.OpenSubKey(@"Applications\WinRar.exe\Shell\Open\Command");
            the_Obj = the_Reg.GetValue("");
            the_rar = the_Obj.ToString();
            the_Reg.Close();
            the_rar = the_rar.Substring(1, the_rar.Length - 7);
            the_Info = " X " + zipname + " " + zippath;
            the_StartInfo = new ProcessStartInfo();
            the_StartInfo.FileName = the_rar;
            the_StartInfo.Arguments = the_Info;
            the_StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
            the_Process = new Process();
            the_Process.StartInfo = the_StartInfo;
            the_Process.Start();
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
        }
    }
}